Ironmaster David Thomas, circa 1860.
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Image of David Thomas, head and shoulders.

Credit: Mathews, Alfred and Hungerford A., History of the Counties of Lehigh and Carbon. Philadelphia, 1884

The ironmaster who perfected the process of making iron with anthracite coal, David Thomas brought his knowledge of "hot-blast" furnace construction from Wales to Pennsylvania, where he oversaw development of the first sustained commercial anthracite furnace in the United States.  Thomas directed the Crane Iron Works, 1839-1855.

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